I agree that Jolly Roger Lagoon is probably the most "Kazooie" of Tooie's Worlds, and that's why it is my favourite. Grunty Industries is also great, due to its mazy dungeon-like structure. It's like playing Zelda in Banjo and it's awesome. However, Terrydactiland (dat triceratops family quest...), Hailfire Peaks and Cloudcuckooland are just terrible in terms of the amount of time spent going to the same areas.
Now i'm seriously concerned about the World 3 of Yooka-Laylee. I've read it's the worse, even worse than the in-famous casino, in both level design and aesthetic (while there is one review that said it was the best one). Can you confirm or refute it?